函数说明要指定函数名、返回值的类型,以及参数类型等,如CREATE OR REPLACE FUNCTION access_hel_by_dbws(username in varchar2) RETURN VARCHAR2 二、语法 CREATE [OR REPLACE] FUNCTION 函数名(参数列表) -- 参数类型与函数返回值类型不用标注类型大小,即varchar2即可 RETURN 函数值类型 AS PLSQL子程序体; 三、...
It contains SQL functions from Oracle 12c, as well as older versions such as 9i, 10g, and 11g. It’s a great page for you to bookmark for future reference. You don’t need to search through Oracle documentation to remember how a certain function works! The SQL functions have been ...
decode(字段或字段的运算,值1,值2,值3) 这个函数运行的结果是,当字段或字段的运算的值等于值1时,该函数返回值2,否则返回值3当然值1,值2,值3也可以是表达式,这个函数使得某些sql语句简单了许多 使用方法:1、比较大小selectdecode(sign(变量1-变量2),-1,变量1,变量2)fromdual;--取较小值sign()函数根据某...
这个是utlpwdmg.sql文件中新版本的口令校验函数FUNCTION verify_function_11G的定义语句: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 CREATEORREPLACEFUNCTIONverify_function_11G(username varchar2,password varchar2,old_password varchar2)RETURNbooleanISn boolean;m integer;differ integer;isdigit boolean;ischar...
Oracle SQL function json_transform modifies JSON documents. You specify operations to perform and SQL/JSON path expressions that target the places to modify. The operations are applied to the input data in the order specified: each operation acts on the data that results from applying all of the...
function to substitute a value for a null. COUNT and REGR_COUNT neverreturn null, but return either a number or zero. For all the remainingaggregate functions, if the data set contains no rows, or contains only rowswith nulls as arguments to the aggregate function, then the function returns...
第二种方式导出.sql格式的文件,可用文本编辑器查看,通用性比较好,效率不如第一种,适合小数据量导入导出。尤其注意的是表中不能有大字段(blob,clob,long),如果有,会提示不能导出(提示如下: table contains one or more LONG columns cannot export in sql format,user Pl/sql developer format instead)。
Oracle:与json_textcontains函数等价的sql语句 我想在json对象中搜索特定值,但不能使用json_textcontains。 Table: | ID | NAME | JSONCOLUMN | ... | 1 | test |{"key1" : "24", "key2": "35", "key3" : "57"} | ... | 2 | test2 |{"key1" : "67", "key2": "78", "key3" ...
PASSWORD_VERIFY_FUNCTION子句允许PL/SQL密码复杂性验证脚本作为参数传递给CREATEPROFILE语句 1. 2. 一、PASSWORD_VERIFY_FUNCTION参数语法: 语法: ALTER PROFILE profile LIMIT { resource_parameters | password_parameters } ... ; {| PASSWORD_VERIFY_FUNCTION ...
If the value of the operand contains information after the decimal point, Oracle FastFormula discards that information and returns a whole number. Example: FLOOR(35.455)returns 35 GREATEST GREATEST_OF(n,n[,n] . . .) The GREATEST function compares all the operands and returns the largest value...